# Aichi 13th district

Aichi 13th district (愛知県第13区, Aichi-ken dai-ju-sanku or simply 愛知13区, Aichi ju-sanku) is a single-member constituency of the House of Representatives in the national Diet of Japan located in Aichi Prefecture.

## Areas covered
### since 1994

* Hekinan
* Kariya
* Anjō
* Chiryū
* Takahama

## List of representatives

| Election | Representative | Party |
| 1996 | Satoshi Shima [ja] | New Frontier |
| 1996 | Satoshi Shima [ja] | New Fraternity |
| 1996 | Satoshi Shima [ja] | Democratic |
| 2000 | Hideaki Ōmura | Liberal Democratic |
| 2003 | Hideaki Ōmura | Liberal Democratic |
| 2005 | Hideaki Ōmura | Liberal Democratic |
| 2009 | Kensuke Ōnishi [ja] | Democratic |
| 2012 | Sei Ōmi [ja] | Liberal Democratic |
| 2014 | Kensuke Ōnishi [ja] | Democratic |
| 2014 | Kensuke Ōnishi [ja] | Democratic |
| 2017 | Kensuke Ōnishi [ja] | Kibō no Tō |
| 2017 | Kensuke Ōnishi [ja] | DPP |
| 2021 | Kensuke Ōnishi [ja] | CDP |
| 2024 | Kensuke Ōnishi [ja] | CDP |

## Election results
### 2021

2021 :
| Party | Party | Candidate | Votes | % | ±% |
| | CDP | Kensuke Ōnishi [ja] (incumbent) | 134,033 | 52.72 | New |
| | Liberal Democratic (endorsed by Komeito) | Taku Ishii [ja] (won PR seat) | 120,203 | 47.28 | |
| Majority | Majority | Majority | 13,830 | 5.44 | |
| Registered electors | Registered electors | Registered electors | 422,731 | | |
| Turnout | Turnout | Turnout | | 61.56 | 1.05 |
| | CDP hold | CDP hold | CDP hold | CDP hold |

### 2017

2017 :
| Party | Party | Candidate | Votes | % | ±% |
| | Kibō no Tō | Kensuke Ōnishi [ja] (incumbent) | 116,471 | 47.42 | New |
| | Liberal Democratic (endorsed by Komeito) | Sei Ōmi [ja] (PR seat incumbent) (won PR seat) | 109,581 | 44.61 | |
| | Communist | Ryoichi Shimojima | 19,589 | 7.97 | |
| Majority | Majority | Majority | 6,890 | 2.81 | |
| Registered electors | Registered electors | Registered electors | 416,667 | | |
| Turnout | Turnout | Turnout | | 60.51 | 0.04 |
| | Kibō no Tō hold | Kibō no Tō hold | Kibō no Tō hold | Kibō no Tō hold |
* Ōmi resigned as a lawmaker to run for the Anjō mayoral election (but he lost).

### 2014

2014 :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Kensuke Ōnishi [ja] (PR seat incumbent) | 116,652 | 49.62 | |
| | Liberal Democratic (endorsed by Komeito) | Sei Ōmi [ja] (incumbent) (won PR seat) | 101,144 | 43.03 | |
| | Communist | Isao Miyaji | 17,285 | 7.35 | |
| Majority | Majority | Majority | 15,508 | 6.59 | |
| Registered electors | Registered electors | Registered electors | 399,518 | | |
| Turnout | Turnout | Turnout | | 60.55 | 3.59 |
| | Democratic gain from LDP | Democratic gain from LDP | Democratic gain from LDP | Democratic gain from LDP | Democratic gain from LDP |

### 2012

2012 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic (endorsed by Komeito) | Sei Ōmi [ja] | 98,670 | 40.31 | |
| | Democratic (endorsed by PNP) | Kensuke Ōnishi [ja] (incumbent) (won PR seat) | 97,187 | 39.70 | |
| | Tomorrow (endorsed by Daichi) | Kōki Kobayashi | 37,405 | 15.28 | New |
| | Communist | Isao Miyaji | 11,514 | 4.70 | |
| Majority | Majority | Majority | 1,483 | 0.61 | |
| Registered electors | Registered electors | Registered electors | 394,757 | | |
| Turnout | Turnout | Turnout | | 64.14 | 11.55 |
| | LDP gain from Democratic | LDP gain from Democratic | LDP gain from Democratic | LDP gain from Democratic | LDP gain from Democratic |

### 2009

2009 :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Kensuke Ōnishi [ja] | 154,779 | 53.79 | |
| | Liberal Democratic | Hideaki Ōmura (incumbent) (won PR seat) | 128,995 | 44.83 | |
| | Happiness Realization | Takashi Murota | 3,950 | 1.37 | New |
| Majority | Majority | Majority | 25,784 | 8.96 | |
| Registered electors | Registered electors | Registered electors | 386,936 | | |
| Turnout | Turnout | Turnout | | 75.69 | 3.76 |
| | Democratic gain from LDP | Democratic gain from LDP | Democratic gain from LDP | Democratic gain from LDP | Democratic gain from LDP |
* Ōmura resigned as a lawmaker to run for the 2011 Aichi gubernatorial election.

### 2005

2005 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Hideaki Ōmura (incumbent) | 139,022 | 53.08 | |
| | Democratic | Satoshi Shima [ja] (PR seat incumbent) | 109,593 | 41.84 | |
| | Communist | Ken Nakamura | 13,311 | 5.08 | |
| Majority | Majority | Majority | 29,429 | 11.24 | |
| Registered electors | Registered electors | Registered electors | 369,801 | | |
| Turnout | Turnout | Turnout | | 71.93 | 5.63 |
| | LDP hold | LDP hold | LDP hold | LDP hold |

### 2003

2003 :
| Party | Party | Candidate | Votes | % |
| | Liberal Democratic | Hideaki Ōmura (incumbent) | 114,092 | 48.44 |
| | Democratic | Satoshi Shima [ja] (PR seat incumbent) (won PR seat) | 109,670 | 46.56 |
| | Communist | Makoto Takabayashi | 11,765 | 5.00 |
| Majority | Majority | Majority | 4,422 | 1.88 |
| Registered electors | Registered electors | Registered electors | 361,655 | |
| Turnout | Turnout | Turnout | | 66.30 |
| | LDP hold | LDP hold | LDP hold | LDP hold |

### 2000

2000 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Hideaki Ōmura (PR seat incumbent) | 104,731 | 45.90 | |
| | Democratic | Satoshi Shima [ja] (incumbent) (won PR seat) | 104,392 | 45.75 | New |
| | Communist | Kanehiko Miyagawa | 15,880 | 6.96 | |
| | Liberal League | Ken Shirai | 3,164 | 1.39 | New |
| Majority | Majority | Majority | 339 | 0.15 | |
| Turnout | Turnout | Turnout | | | |
| | LDP gain from Democratic | LDP gain from Democratic | LDP gain from Democratic | LDP gain from Democratic | LDP gain from Democratic |

### 1996

1996 :
| Party | Party | Candidate | Votes | % | ±% |
| | New Frontier | Satoshi Shima [ja] | 87,991 | 46.78 | New |
| | Liberal Democratic | Hideaki Ōmura (won PR seat) | 80,629 | 42.86 | New |
| | Communist | Makoto Takabayashi | 19,484 | 10.36 | New |
| Majority | Majority | Majority | 7,362 | 3.92 | |
| Turnout | Turnout | Turnout | | | |
| | New Frontier win (new seat) | New Frontier win (new seat) | New Frontier win (new seat) | New Frontier win (new seat) |